What is the name of the evil space station that can destroy planets?

The story behind the answer

The correct choice is the Empire’s moon-sized battle station capable of annihilating entire planets; it famously destroys Alderaan in A New Hope. Don’t confuse it with Starkiller Base (the First Order’s later superweapon that drains a star to fire across the galaxy), the Sun Crusher (a Legends microcraft that triggers stars to go nova), or the Doomsday Machine (a Star Trek device, not Star Wars).

Conceived under the Tarkin Doctrine to rule through fear, it channels kyber crystals to power its superlaser. Luke Skywalker destroys the first with a proton torpedo into an exhaust port; a larger second version is later defeated at Endor, marking a turning point in the Galactic Civil War.